fix failing tests in master

test/rendering/fadeout.mss

@@ -1,3 +1,3 @@
 #world {
-    marker-fill: fadeout(#000, 5j);
+    marker-fill: fadeout(#000, 50%);
 }

test/rendering/rastercolorizer.result

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!DOCTYPE Map[]>
+<Map srs="+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over" maximum-extent="-20037508.34,-20037508.34,20037508.34,20037508.34">
+
+
+<Style name="world" filter-mode="first">
+  <Rule>
+    <RasterSymbolizer opacity="0" default-mode="discrete" default-color="#ff0000" epsilon="0.05" >
+	<stop value="5" color="#ff0000" /> 
+	<stop value="10" color="#ff4400"  mode="linear" /> 
+	<stop value="10" color="#ff8800" /></RasterSymbolizer>
+  </Rule>
+</Style>
+<Layer name="world"
+  srs="+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over">
+    <StyleName>world</StyleName>
+    <Datasource>
+       <Parameter name="file">[absolute path]</Parameter>
+       <Parameter name="type"><![CDATA[shape]]></Parameter>
+    </Datasource>
+  </Layer>
+
+</Map>